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A population-based study of traumatic brain injury incidence and mechanisms in New Zealand

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From Māori Health Review Issue 120
Authors:
  • Jones K et al., for the BIONIC and BIONIC2 Study Groups
Summary:

Examination of traumatic brain injury (TBI) in the Waikato region found that Māori are at higher risk than European and Asian peoples, and that incidence and rates in Māori remained stable in 2021-2022 compared with 2010-2011. The overall incidence of TBI in 2021-2022 was 842 per 100,000 person-years, including 791 mild cases and 61 moderate to severe cases. Compared with the period 2010-2011, TBI incidence in 2021-2022 increased in females, urban residents and adults aged ≥34 years, and the proportion of TBI cases due to falls also increased.

Comment:
I started my rangahau hauora journey 25 years ago in the TBI field and unfortunately this study shows that it is still a significant issue, with Māori continuing to experience higher incidence rates. Long-term, TBI contributes to downstream inequities including mental health issues, limited education outcomes and increased risk for imprisonment. Underlying determinants – such as occupational risk, housing conditions, exposure to violence and access to prevention and care – aren’t being adequately addressed and need urgent attention.
Reference: Lancet Reg Health West Pac. 2026;67:101797. 
Abstract
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Independent commentary by Dr. Matire Hardwood

Dr Matire Harwood (Ngapuhi) has worked in Hauora Māori, primary health and rehabilitation settings as clinician and researcher since graduating from Auckland Medical School in 1994. She also holds positions on a number of boards, committees and advisory groups including the Health Research Council. Matire lives in Auckland with her whānau including partner Haunui and two young children Te Rangiura and Waimarie.

Research Review publications are intended for New Zealand health professionals.

Disclaimer: This publication is not intended as a replacement for regular medical education but to assist in the process. The reviews are a summarised interpretation of the published study and reflect the opinion of the writer rather than those of the research group or scientific journal. It is suggested readers review the full trial data before forming a final conclusion on its merits.

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